The 2013 edition of the Heritage Days in the Brussels Capital Region will take place on 14th and 15th September on the theme: "Brussels, m’as-tu vu?/Brussels show off".
This year, the Heritage Days celebrate their 25th anniversary in Belgium: the perfect opportunity for a festive programme with over 100 venues and lots of events around Art Nouveau heritage.
Open to all and completely free

In Nancy the Villa Majorelle, listed as Historic Monuments since 1996, is open on Saturday and Sunday from 10 to 12 am and 2 to 6 pm.
Free entrance, access to the ground-floor and the garden.
At the Musée de l’Ecole de Nancy, the aquarium (listed) and the garden (registered) are stamped as Historic Monuments, since 1998.
The Museum will be open on Saturday and Sunday from 10 am to 6 pm. Free entrance with exceptional opening of the aquarium.